Preserving piles



(No Model.)

J. CASS. PRESERVING PILES.

No. 508,279. Patented Nov. 7, 1893.

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- UNITED STATES ,PATENT' OFFICE.

JAMES CASS, OF CAYUCCS LANDING, CALIFORNIA.

PRESERVING PILEIS.

SPECIFICATION forming part of Letters Patent No. 508,279, dated November7,1893.

; Application filed June 26, 1893. Serial No. 4'78,894. (No specimens.)

To all whom/ it may concern:

Be it known that I, JAMES CASS, a citizen of the United States, residingat Cayucos Landing, San Luis Obispo county, State of California, haveinvented an Improvement in Preserving Piles; and I hereby declare thefollowing to be a full, clear, and exact descriptionof the same. u

My inventipn relates to the art of preserving piles, and other submergedwooden structures from the ravages of marine worms and insects.

My presentinvention is an improvement upon that process of preservingpiles heretofore patented to me September 28, 1886, No.

349,835, and it consists in placing between the felt coating and theexterior battens, a layer of sheet lead.

Referring to the accompanying drawing for a more complete explanation ofmy invention,the figure is a vertical section of a pile showing theapplication of the preservative coatings or layers of myinvention, thesecoatings or layers being shown broken away above and below and differentplanes in order to better distinguish them.

Inpreparing a pile A, the bark is peeled away from that portion which isto be protected, and it is then coated with a suitable waterproofcompound B'preferably of a poisonous nature, such, for example, as Idescribed in my previous patent, and consisting of equal parts of pitchand coal tar, and about one-quarter of a pound of arsenic to the gallonof tar. This compound is applied to the pile hot. Over thiscoatingIpl'ace alayer of common ship felt represented by 0. Around thisfelt I then place a layer of sheet lead, represented by F, said leadentirely covering the felt; and, finally, around this leadI secure anouter layerof battens represented byl), which cover the lead entirely,and are secured in any suitable manner, as by the hoopsE which encirclethe whole. I

It will be observed that in this invention, the several steps andfeatures of my previous patent are involved and followed out, and inaddition thereto I now place between the felt layer and the outsidebattens, the layer of sheet lead. I have found b'y'experiment that thismaterial, namely, sheet lead, is the best possible for the purpose, itbeing non-corrosive, light and flexible, and not too expensive. Theobject of introducing it, is that in the course of time, the battensbecome worm eaten and the water getting to the felt, swells it andfinally washes it off in patches; but by the interposition of the sheetlead between the felt and the battens, the former is fully protected andheld in place, even though the latter be entirely eaten away. It is,therefore, a complete protector to the felt after the battens becomebadly eaten.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In piles and structures to be submerged having an inner and outerlining, a non-corrosive and flexible metal envelope placed between saidlinings, and means for securing the same in position.

2, Piles or structures to be submerged, having a water proof coatingapplied to their surfaces, a layer of felt placed over said coating, alayer of sheet lead, placed over the felt, battensor strips on the outerside of the lead, and 'means for securing the several layers andbattens, substantially as herein described.

In witness whereof I have hereunto set my hand.

JAMES CASS.

Witnesses;

J. J. SIMMLER, v A. L. BURROUGHS.

